Electric heating device



J. R. ROSE.

ELECTRIC HEATING DEVICE.

APPLICATION FILED MAR; 23, 1920.

1,431, 1 8 1, Patentd Oct. 1%, 1922.

Patented on. 10, 1922.

r OFFICE.

JAMES 'R. ROSE, 0F EDGEWORTH, PENNSYLVANIA.

ELECTRIC H EA'IIING DEVICE.

Application filed March 8, 1920. Serial No. 364,225..

To all! whom it may concern:

Be it known that I, James R. Rose, a citizen ofthe United States, residing at Edgeworth, in the county of Allegheny and State' of Pennsylvania, have invented a certain new and. useful Improvement in Electric Heating Devices, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates to electric heaters and has especial reference to a heater of the reflection type wherein the heat is generated by a coil of resistance wire located approximately at the focal point of a parabolic or other concave reflector whereby the radiant energy is projected in the desired direction. It is to be noted however that under ordinary conditions the heating effect of such a device upon the surrounding air is extremely small, the radiant energy not appearing as sensible heat to any appreciable extent until it falls upon some object ca able of absorbing the ether waves. The 0 jects of in invention are the provision upon such a refiiactor of means for directly heati the air; the provision in combination with a radiant heater of means for producing a current of heated air; the provision of a new type of electric air-warming device; while further objects and advantages of my invention will become apparent as the description proceeds.

In the drawings accompanying and forming a part of this application, I have illustrated certain embodiments of my invention although it will be understood that these constitute only a few of the many physical forms in which my improvements can be embodied. In these drawings, Fig. 1 is a' vertical sectional through a heater of the radiant type containing my improvements; Fig. 2 represents an end view of the heating element and its adjuncts; Fig. 3 illustrates a modified form of device and Fig. 4 is an end elevation of the element shown in Fig. 3.

Describing by reference characters the parts shown in these drawings, 1 represents a concave reflector, generally spherical or paraboloid in form, and 2 represents the stand which supports the same. Secured in the center or vertex of this reflector is the heating element 3 shown in Fig. l as consisting of a spool of insulating material capable of standing high temperatures and wound with resistance wire at and here shown as supported with its axis parallel to the axis of the reflector. Surrounding this element and spaced therefrom sufliciently to provide an air passage is a tube 5 rigidly attached to the reflector. The spool 3 is supported in place therein in any suitable way as by the spider 6, thus permitting the passage of air. The tube 5 is preferably made of porcelain but may be of any suitable material which will withstand the temperature to which it is subjected. Urdinarily, in practice it becomes very hot, the radiation from the exterior of the tube falling upon the reflector and being projected in the usual manner, while the air passing through the spool and tube is itself rapidly warmed- Such a circulation is almost invariably produced even though such a tube be held exactly horizontal, and is rendered all the more pronounced by an inclination of the reflector such as is usually employed.

In Figs. 3 and 4 I have shown a modified form in which the spool 3* instead of being.

surrounded by a tube is itself hollowed out so as to constitute the tube, the bore 8 providing the air passage. This arrangement serves to deliver a slightly larger pro ortion of the total energy in the form 0 radiant heat and a slightly smaller proportion in the form of convection currents. In neither case, however, is there any heat lost.

It will be understood that I do not restrict myself to the employment of such an air.

2. The combination with a concave me- '3. The combination with a concave metallic reflector, of a tubular member supported 7 in the axis thereof and opening through the vertex of the reflector through the front and rear thereof, and a resistance heating element adapted to heat the air entering said tube from the rear of the reflector and passing therethroughand also to set up heat waves which are reflected by the metallic surface, said heated air and heat waves both being ejected into the room.

4. The combination with a concave metallic reflector of a tubular member of heat resistant material opening through the vertex thereof and coaxial therewith, and a resistance coil coaxial with said tube whereby the air traversing the tube is warmed and heat is also produced which is reflected by the metallic surface, said heated air and refiected heat being projected in the same di- 20 rection into the room. a

In testimony whereof, I hereunto aflix my signature.

JAMES R. ROSE. 

